Curve guidance method, curve guidance apparatus, electronic apparatus and program stored in the computer-readable recording medium

Abstract

A road curve guidance method is provided. The road curve guidance method includes: obtaining link information corresponding to a road on which a vehicle is being driven; determining a position of the vehicle on a link at a future time point based on the obtained link information; and judging a degree of risk of a curve section in which the vehicle is to be driven after a predetermined time using the determined position and speed of the vehicle at a reference time point.

What is claimed is: 
     
       1. A curve guidance method comprising:
 judging a degree of risk of a curve section in which a vehicle is to be driven after a predetermined time by comparing a first value with a predetermined threshold value; and 
 displaying a curve section guidance object corresponding to the judged degree of risk of the curve section on an augmented reality image, 
 wherein the displaying the curve section guidance object comprises: 
 displaying a first curve section guide object when the judged degree of risk of the curve section is a first risk level; 
 displaying a second curve section guide object when the judged degree of risk of the curve section is a second risk level; and 
 not displaying the curve section guide object when the judged degree of risk of the curve section is lower than the first risk level, 
 wherein the first risk level is an attention level and the second risk level is a warning level, and 
 wherein the first curve section guide object and the second curve section guide object are displayed to be distinguished from each other. 
 
     
     
       2. The method of  claim 1 ,
 wherein the judging the degree of risk of the curve section comprises: 
 obtaining link information corresponding to each of a road on which the vehicle is running and a road on which the vehicle is to be driven; 
 determining a position of the vehicle on a link at each of a current time point and a future time point; and 
 judging the degree of risk of the curve section in which the vehicle is to be driven after the predetermined time using the determined position of the vehicle at the future time point and a speed of the vehicle at the current time point. 
 
     
     
       3. The method of  claim 2 ,
 wherein the judging the degree of risk of the curve section further comprises calculating the first value for judging the degree of risk of the curve 
 and comparing the calculated first value with the predetermined threshold value. 
 
     
     
       4. The method of  claim 3 ,
 wherein the first value is a centrifugal force or a flexure angle. 
 
     
     
       5. The method of  claim 3 ,
 wherein the predetermined threshold value includes a first threshold value and a second threshold value, and 
 wherein the judging the degree of risk of the curve section further comprises: 
 judging the degree of risk of the curve section in which the vehicle is to be driven after the predetermined time as a not-dangerous section when the first value is smaller than a first threshold value; 
 judging the degree of risk of the curve section in which the vehicle is to be driven after the predetermined time as the first risk level when the first value is greater that the first threshold value and is smaller than a second threshold value; and 
 judging the degree of risk of the curve section in which the vehicle is to be driven after the predetermined time as the second risk level when the first value is greater than the second threshold value. 
 
     
     
       6. The method of  claim 5 ,
 wherein the judging the degree of risk of the curve section further comprises adjusting the first threshold value and the second threshold value based on link attribute information of the link, and 
 wherein the link attribute information includes at least one of road rank information, road width information, information of a number of lanes of the road and road slope information. 
 
     
     
       7. The method of  claim 1 ,
 wherein the first curve section guide object and the second curve section guide object are displayed along a lane on which the vehicle is running in a road region of the augmented reality image. 
 
     
     
       8. The method of  claim 1 ,
 wherein the first curve section guide object and the second curve section guide object are displayed in an erected arrow shape. 
 
     
     
       9. The method of  claim 1 ,
 wherein the displaying further comprises displaying an object indicating a direction of the curve section. 
 
     
     
       10. A curve guidance apparatus comprising:
 a display; 
 a degree of risk judging unit comprising at least one processor configured to judge a degree of risk of a curve section in which a vehicle is to be driven after a predetermined time by comparing a first value with a predetermined threshold value; and 
 a controller controlling the display to display a curve section guidance object corresponding to the judged degree of risk of the curve section on an augmented reality image, 
 wherein the display is configured to: 
 display a first curve section guide object when the judged degree of risk of the curve section is a first risk level; 
 display a second curve section guide object when the judged degree of risk of the curve section is a second risk level; and 
 not to display the curve section guide object when the judged degree of risk of the curve section is lower than the first risk level, 
 wherein the first risk level is an attention level and the second risk level is a warning level, and 
 wherein the first curve section guide object and the second curve section guide object are displayed to be distinguished from each other. 
 
     
     
       11. The apparatus of  claim 10 ,
 wherein the degree of risk judging unit is further configured to: 
 obtain link information corresponding to each of a road on which the vehicle is running and a road on which the vehicle is to be driven; 
 determine a position of the vehicle on a link at each of a current time point and a future time point; and 
 judge the degree of risk of the curve section in which the vehicle is to be driven after the predetermined time using the determined position of the vehicle at the future time point and a speed of the vehicle at the current time point. 
 
     
     
       12. The apparatus of  claim 11 ,
 wherein the degree of risk judging unit is further configured to 
 calculate the first value for judging the degree of risk of the curve 
 and compare the calculated first value with the predetermined threshold value. 
 
     
     
       13. The apparatus of  claim 12 ,
 wherein the first value is a centrifugal force or a flexure angle. 
 
     
     
       14. The apparatus of  claim 12 ,
 wherein the predetermined threshold value includes a first threshold value and a second threshold value, and 
 wherein the degree of risk judging unit is further configured to: 
 judge the degree of risk of the curve section in which the vehicle is to be driven after the predetermined time as a not-dangerous section when the first value is smaller than a first threshold value; 
 judge the degree of risk of the curve section in which the vehicle is to be driven after the predetermined time as the first risk level when the first value is greater that the first threshold value and is smaller than a second threshold value; and 
 judge the degree of risk of the curve section in which the vehicle is to be driven after the predetermined time as the second risk level when the first value is greater than the second threshold value. 
 
     
     
       15. The apparatus of  claim 10 ,
 wherein the first curve section guide object and the second curve section guide object are displayed along a lane on which the vehicle is running in a road region of the augmented reality image. 
 
     
     
       16. The apparatus of  claim 10 ,
 wherein the first curve section guide object and the second curve section guide object are displayed in an erected arrow shape. 
 
     
     
       17. The method of  claim 10 ,
 wherein the display is further configured to display an object indicating a direction of the curve section. 
 
     
     
       18. A non-transitory computer readable storage medium with a computer program to execute a curve guidance method, the curve guidance method comprising:
 judging a degree of risk of a curve section in which a vehicle is to be driven after a predetermined time by comparing a first value with a predetermined threshold value; and 
 displaying a curve section guidance object corresponding to the judged degree of risk of the curve section on an augmented reality image, 
 wherein the displaying the curve section guidance object comprises: 
 displaying a first curve section guide object when the judged degree of risk of the curve section is a first risk level; 
 displaying a second curve section guide object when the judged degree of risk of the curve section is a second risk level; and 
 not displaying the curve section guide object when the judged degree of risk of the curve section is lower than the first risk level, 
 wherein the first risk level is an attention level and the second risk level is a warning level, and 
 wherein the first curve section guide object and the second curve section guide object are displayed to be distinguished from each other. 
 
     
     
       19. The apparatus of  claim 14 ,
 wherein the degree of risk judging unit is further configured to adjust the first threshold value and the second threshold value based on link attribute information of the link, and 
 wherein the link attribute information includes at least one of road rank information, road width information, information of a number of lanes of the road, and road slope information.